diff options
Diffstat (limited to 'MdeModulePkg/Application/CapsuleApp/AppSupport.c')
| -rw-r--r-- | MdeModulePkg/Application/CapsuleApp/AppSupport.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/MdeModulePkg/Application/CapsuleApp/AppSupport.c b/MdeModulePkg/Application/CapsuleApp/AppSupport.c index 0a1224db54..6aea76a720 100644 --- a/MdeModulePkg/Application/CapsuleApp/AppSupport.c +++ b/MdeModulePkg/Application/CapsuleApp/AppSupport.c @@ -27,6 +27,9 @@ #include <Guid/FileInfo.h>
#include <Guid/Gpt.h>
+#define IS_HYPHEN(a) ((a) == L'-')
+#define IS_NULL(a) ((a) == L'\0')
+
#define MAX_ARG_NUM 11
UINTN Argc;
@@ -61,6 +64,144 @@ GetArg ( }
/**
+ Converts a list of string to a specified buffer.
+
+ @param[out] Buf The output buffer that contains the string.
+ @param[in] BufferLength The length of the buffer
+ @param[in] Str The input string that contains the hex number
+
+ @retval EFI_SUCCESS The string was successfully converted to the buffer.
+
+**/
+EFI_STATUS
+StrToBuf (
+ OUT UINT8 *Buf,
+ IN UINTN BufferLength,
+ IN CHAR16 *Str
+ )
+{
+ UINTN Index;
+ UINTN StrLength;
+ UINT8 Digit;
+ UINT8 Byte;
+
+ Digit = 0;
+
+ //
+ // Two hex char make up one byte
+ //
+ StrLength = BufferLength * sizeof (CHAR16);
+
+ for(Index = 0; Index < StrLength; Index++, Str++) {
+
+ if ((*Str >= L'a') && (*Str <= L'f')) {
+ Digit = (UINT8) (*Str - L'a' + 0x0A);
+ } else if ((*Str >= L'A') && (*Str <= L'F')) {
+ Digit = (UINT8) (*Str - L'A' + 0x0A);
+ } else if ((*Str >= L'0') && (*Str <= L'9')) {
+ Digit = (UINT8) (*Str - L'0');
+ } else {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // For odd characters, write the upper nibble for each buffer byte,
+ // and for even characters, the lower nibble.
+ //
+ if ((Index & 1) == 0) {
+ Byte = (UINT8) (Digit << 4);
+ } else {
+ Byte = Buf[Index / 2];
+ Byte &= 0xF0;
+ Byte = (UINT8) (Byte | Digit);
+ }
+
+ Buf[Index / 2] = Byte;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Converts a string to GUID value.
+ Guid Format is xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+
+ @param[in] Str The registry format GUID string that contains the GUID value.
+ @param[out] Guid A pointer to the converted GUID value.
+
+ @retval EFI_SUCCESS The GUID string was successfully converted to the GUID value.
+ @retval EFI_UNSUPPORTED The input string is not in registry format.
+ @return others Some error occurred when converting part of GUID value.
+
+**/
+EFI_STATUS
+StrToGuid (
+ IN CHAR16 *Str,
+ OUT EFI_GUID *Guid
+ )
+{
+ //
+ // Get the first UINT32 data
+ //
+ Guid->Data1 = (UINT32) StrHexToUint64 (Str);
+ while (!IS_HYPHEN (*Str) && !IS_NULL (*Str)) {
+ Str ++;
+ }
+
+ if (IS_HYPHEN (*Str)) {
+ Str++;
+ } else {
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Get the second UINT16 data
+ //
+ Guid->Data2 = (UINT16) StrHexToUint64 (Str);
+ while (!IS_HYPHEN (*Str) && !IS_NULL (*Str)) {
+ Str ++;
+ }
+
+ if (IS_HYPHEN (*Str)) {
+ Str++;
+ } else {
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Get the third UINT16 data
+ //
+ Guid->Data3 = (UINT16) StrHexToUint64 (Str);
+ while (!IS_HYPHEN (*Str) && !IS_NULL (*Str)) {
+ Str ++;
+ }
+
+ if (IS_HYPHEN (*Str)) {
+ Str++;
+ } else {
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Get the following 8 bytes data
+ //
+ StrToBuf (&Guid->Data4[0], 2, Str);
+ //
+ // Skip 2 byte hex chars
+ //
+ Str += 2 * 2;
+
+ if (IS_HYPHEN (*Str)) {
+ Str++;
+ } else {
+ return EFI_UNSUPPORTED;
+ }
+ StrToBuf (&Guid->Data4[2], 6, Str);
+
+ return EFI_SUCCESS;
+}
+
+/**
Return File System Volume containing this shell application.
@return File System Volume containing this shell application.
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